Natural Gas Emergencies

Question 1

Whenever Portland fire is dispatched to a natural gas incident who is also dispatched?

Answer 1

Northwest Natural

Question 2

At what natural gas level should you withdraw?

Answer 2

When natural gas levels reach 1% volume

(20 reading on air monitor)

Question 2

What is the flammable range of natural gas?

Answer 2

5 to 15%

Question 3

Are Portland fire Personnel allowed to close gas meter riser valves?

Answer 3

Yes

Question 4

Can Portland fire Personnel restore gas service?

Answer 4

No

Question 5

What are the three types of gas pipe found in the Portland area?

Answer 5

1. Steel
2. Direct buried poly
3. Poly inserted in casing

Question 6

CNG is stored at what psi?

Answer 6

3000

Question 7

How is a CNG vehicle marked? LNG?

Answer 7

Blue diamond shape sticker with silver border and says CNG. Same but LNG

Question 8

What is LNG being used to power?

Answer 8

Only PUBLIC transportation

Question 9

What temperature is LNG stored at?

Answer 9

-260° f

Question 10

On a natural gas incident, restrict vehicles and pedestrians how far from site?

Answer 10

Within 1 block (300’) of site

Question 11

Attempting to do anything prior to the arrival of NW Natural should only be what?

Answer 11

Closing gas meter RISER VALVES

Question 12

Is Natural gas heavier or lighter than air?

Answer 12

LIGHTER

Question 13

A DISTRIBUTION gas line is what psi?

Answer 13

LOWER than 50

Question 14

Can we close a gas line located on the customer side of property or the street valve?

Answer 14

NEVER street. Customer side only

Question 15

DO NOT extinguish a burning natural gas leak outside of a structure. If you absolutely have to, extinguish it with what?

Answer 15

A DRY CHEMICAL extinguisher

Question 16

How much flow reduction will a Excess flow device check valve reduce?

Answer 16

Reduce by 95%

(some still leaks so it can be detected)

Question 17

How will you know if a gas line is equipped with an excess flow device?

Answer 17

Diamond hole stamp on metal washer on riser

Question 18

When will excess flow devices be installed on all new construction?

Answer 18

Beginning JAN 1999

Question 19

What vehicles are more common, CNG or LNG?

Answer 19

CNG

Question 20

Do you dissipate or dike LNG?

Answer 20

Dike